JPH03295698A - Printing device - Google Patents

Abstract

PURPOSE:To allow secure printing even on a printed circuit board with an uneven surface and also make the width of an ink line uniform by moving an ink particle splashing device in X and Y directions using an X direction movement device and a Y direction movement device with ink particles splshed in the same direction using the ink particle splashing device. CONSTITUTION:When data is printed on a printed circuit board which is an element to be printed 2, an ink particle splahing device 3 is switched ON to allow continuous splashing of ink particles in the same direction to the element 2. Then the head 7 of the ink particle splashing device 3 is rapidly moved in 'X' direction and 'Y' direction using an X direction movement device 4 and a Y direction movement device 5. Subsequently, characters, number and patterns are printed by movement of the X direction movement device 4 and the Y direction movement device 5 in the X and Y directions.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a printing device for printing loft numbers, product numbers, figures, etc. on printed materials such as printed wiring boards. It is something.

[Prior Art] A printing device called a pen plotter has been known for a long time, but since this conventional pen plotter prints by applying the tip directly to the object to be printed, it is difficult to print on things such as printed wiring boards. There is a risk of quality deterioration due to printing, and there is also the problem that it is difficult to print accurately if the surface of the printing medium is uneven, or the printing medium is warped or twisted. be.

Therefore, the applicant of the present invention has already filed an application in Japanese Patent Application No. 1-182825 for printing a loft number, product number, etc. on a printed wiring board using an Ink Genie printer. When printing loft numbers, product numbers, etc. on a printed wiring board using an inkjet printer, the printing can be done without applying printing pressure directly to the printed wiring board, and in this respect, it is important to prevent the quality of the printed wiring board from deteriorating. Can be done.

[Problems to be Solved by the Invention] However, inkjet printers divide marking end characters into pixels into a Todd matrix, and charge ink particles with a voltage proportional to the positional information of each pixel.
Furthermore, the pixel characters (characters composed of tods) are marked by deflecting them using an electric field and allowing them to reach the printing target. In other words, each ink droplet is charged by a charging electrode to a voltage corresponding to a signal voltage, and when the charged ink droplet passes between deflection electrodes, it is deflected according to the amount of charge, and the flight direction of each ink droplet is Since printing is performed on the printing medium instead of the ink droplets, the control device for charging each ink droplet to a corresponding voltage and deflecting each ink droplet according to the amount of charge is complicated and costly. This poses a problem in that it may not be possible to use some types of ink (for example, ink with a large amount of charge) because it requires subtle charging.

The present invention was invented in view of the problems of the conventional examples described above, and its purpose is to enable printing without directly applying printing pressure to the printing medium, and to reduce the amount of ink particles.
It is an object of the present invention to provide a printing device that does not require delicate charge control that differs from one product to another and is not limited to the type of ink.

[Means for Solving Problem W] The printing device of the present invention includes an ink particle flying device 3 that causes ink particles 1 to fly in the same direction and reach a printing target 2;
It is provided with an X-direction moving means 4 and a Y-direction moving means 5 for moving the ink droplet flight device 3 in the X direction and the Y direction, and by adopting such a configuration,
This achieves the above-mentioned object of the present invention.

[Operation] Thus, while the ink droplet flying device 3 causes the ink particles 1 to fly in the same direction, the ink droplet flying device W3 is moved in the X direction and the Y direction by the X direction moving device 4 and the Y direction moving device 5. This is used to print letters, numbers, figures, etc. on the printing medium 2. By flying the ink particles 1 and printing, it is possible to print without applying printing pressure to the printing object 2, and unlike conventional inkjet printers, each ink particle is Characters, numbers, figures, etc. are drawn by changing the charge amount of the ink particles 1 and changing the flying direction (XY force generated by the X direction moving means 4 and the Y direction moving means 5, assuming the flying direction of the ink particles 1 is constant). Since letters, numbers, figures, etc. are drawn by directional movement, there is no need to subtly change the amount of charge for each ink droplet.

[Examples] The present invention will be described in detail below based on examples shown in the accompanying drawings.

FIG. 1 shows a schematic perspective view of the device of the invention. A head 7 of an ink particle flying device 3 is arranged above a base 6 on which a printing object 2 such as a printed wiring board is placed.

The blade 7 of the ink droplet flying device 3 is movable in the X direction and the Y direction by means of an X direction moving means 4 and a Y direction moving element Pi5. , in the embodiment of FIG.
The rail 9 in the Y direction is arranged so as to be orthogonal to the rail 8 in the direction, and the rail 9 moves in the longitudinal direction of the rail 8 (that is, in the X direction) while maintaining an attitude perpendicular to the rail 8. The rail 9 is further set to move a head 7 along the longitudinal direction (that is, the Y direction) of the rail 9 to move the head 7 in the Y direction. Means 5 constitutes. The ink droplet flying device 3 has a function of making the ink droplets 1 fly in the same direction and reach the printing medium 2. Second
The figure shows a principle diagram of the ink particle flying device 3, in which ink stored in an ink container 11 is pressurized by a pump 12 and is ejected from a head 7 in the form of a liquid column. Then, the liquid column ejected from the head 7 becomes ink particles 1 of a certain size due to the vibration of the electrostrictive element 13, and these ink particles 1 are charged with the same voltage by the charging electrode 14, and are charged to this same voltage. When the ink particles 1 pass between the deflection electrodes 15, they are deflected to a certain degree and fly in the same direction, reaching the printing medium 2. 1 in the diagram
A gutter 6 is used to capture ink particles in the initial stage of flight when the ink particle flying device 3 starts, and to capture extra ink particles flying in the final stage when the ink particle flying device 3 stops. The ink particles 2 that fly without deflecting the ink particles 2 in the same direction are captured by the gutter 16. The ink particles 2 captured by the gutter 16 are collected into the ink container 11 by a collection pump 17.

Therefore, when printing on a printed wiring board, which is the printing medium 2, using the above-mentioned device, the ink droplet flying device 3 is turned on and the ink particles 1 are continuously directed in the same direction onto the printing medium 2. At the same time, the head 7 of the ink particle flight printing device 3 is moved in the X direction and the Y direction by the X direction moving means 4.
It is moved at high speed by the X-direction moving means 4 and the Y-direction moving elements 5 and 5, and characters, numbers, patterns, etc. are printed by moving the X-direction moving means 4 and the Y-direction movers 5 and 5 in the XY force directions. Here, the movement of the head 7 by the X-direction moving means 4 and the X-direction moving means 5 is carried out in the XY force directions corresponding to the characters, numbers, patterns, etc. to be drawn based on the control signals issued from the CAD/CAMi [machine]. It is. In this case, if the direction of flight of the ink particles 1 is off from the axis of the head 7, the head 7 is provided with a rotating means 10 to cause the head 7 to fly away from the head 7. Letters, numbers, patterns, etc. may be drawn on the printing medium 2 by the ink particles 1. In this case, the rotating means 10 is also a CAD/C
This is done based on the control signal output from the AM device.
When it is moved in the Y force direction, it moves under the control of a conventional CAD/CAM device to draw letters, numbers, patterns, etc. (the movement control program of a pen plotter can be used as is).

Note that the distance between the tip of the head 7 and the printing target 2 is 1 s.
It is preferable to set it to about m+ to 10a+m.

[Effects of the Invention] As described above, the present invention includes an ink particle flying device that causes ink particles to fly in the same direction to reach a printing medium, and an ink particle flying device that flies ink particles in the same direction to reach a printing medium. Since it is equipped with an X-direction moving means and an X-direction moving means for moving, the nozzle does not come into direct contact with the printing target compared to conventional pen plotters, so it is possible to print on uneven printed wiring boards as the printing target. In addition, since ink particles are printed by scattering, the ink line width can be made uniform, and it is not affected even if the surface of the printing material is coarse, dense, porous, etc. It prints well even on printed materials that are warped or twisted (by the way, printed wiring boards are warped by at least ±0.55 m to ±5 mm), and you can finish printing without worrying. Unlike conventional inkjet printers, which change the charge amount of each ink droplet and change the flight direction to draw letters, numbers, figures, etc., this method keeps the flight direction of the ink droplets constant and moves in the X direction. Since letters, numbers, figures, etc. are drawn by moving in the XY force directions using the and X direction moving means, there is no need to delicately change the amount of charge for each ink droplet. There is an advantage that different delicate charge control is not required, and the type of ink is not limited.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of the present invention, and FIG. 2 is an explanatory diagram of the principle of an ink particle flying device, where 1 is an ink particle, 2 is a printing medium, 3 is an ink particle flying device, and 4 is a movement in the X direction. means,
5 is an X direction moving means.

Claims (1)

[Claims] (1) An ink particle flying device that causes ink particles to fly in the same direction to reach a printing target, and an X direction moving device and a Y direction moving device that move this ink particle flying device in the X direction and the Y direction. A printing device comprising: